4.
Counting of RBCs can be performed either:

Automated Method: (Electronic hematology cell counter, e.g.
COULTER)
OR

Manual Method: (visual using a microscope and counting
chmber), which is a cumbersome and less accurate.

5.
o
The solution used for red cell count is Isotonic with RBCs;
doesn’t lyse leukocytes.
o
Leukocytes are normally too few which can be identified easily
and won’t be interfered with erythrocytes count.